Should I advance my cam more? TSP 228R
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Should I advance my cam more? TSP 228R
I am debating either advancing my cam more via an adjustable timing chain or buying another with more advance. I am thinking I need to bring my curve down in the RPM range a bit. cam specs 228/228 588/588 109ICL +3*112LSA
Is it possible for me to bring the peak in this DYNO sheet down about 300 - 500 RPM's? Would it be easier to just buy another cam with more advance ground in? My peak seems to be about 6600. I'd like to have it about 6300.
Any suggestions would be much appreciated.
James
Is it possible for me to bring the peak in this DYNO sheet down about 300 - 500 RPM's? Would it be easier to just buy another cam with more advance ground in? My peak seems to be about 6600. I'd like to have it about 6300.
Any suggestions would be much appreciated.
James
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Re: Should I advance my cam more? TSP 228R
Before advancing your cam, do you know the P to V clearance with the cam as is? I think each degree of advance reduces P to V by .007 or something like that. One of the experts might be able to comment, I could be mistaken.
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Re: Should I advance my cam more? TSP 228R
I would test car at the track and analyze results that way.Your cam is in at 106* now, that should be plenty of advance.You need more gear if anything not lower peak rpm.
Just my 2 cents.
Just my 2 cents.
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Re: Should I advance my cam more? TSP 228R
If your on the stock timing chain now, you can go to a double roller rollmaster and install it at 0 adv and it may bring it down a little. The stock timing chain has a few degrees of retard "built-in"
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Re: Should I advance my cam more? TSP 228R
Every degree of advance lowers the peak hp and torque about 50 rpm.
I think you need more converter. A 3800 rpm stall is not enough for that cam. You want your true stall rpm 500 below peak torque.
Of course a different cam would bring it down too. I would not advance this cam three more degrees without checking piston/valve clearance like "99 Black Bird" has said.
I think you need more converter. A 3800 rpm stall is not enough for that cam. You want your true stall rpm 500 below peak torque.
Of course a different cam would bring it down too. I would not advance this cam three more degrees without checking piston/valve clearance like "99 Black Bird" has said.
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Re: Should I advance my cam more? TSP 228R
Every degree of advance lowers the peak hp and torque about 50 rpm.
I think you need more converter. A 3800 rpm stall is not enough for that cam. You want your true stall rpm 500 below peak torque.
Of course a different cam would bring it down too. I would not advance this cam three more degrees without checking piston/valve clearance like "99 Black Bird" has said.
I think you need more converter. A 3800 rpm stall is not enough for that cam. You want your true stall rpm 500 below peak torque.
Of course a different cam would bring it down too. I would not advance this cam three more degrees without checking piston/valve clearance like "99 Black Bird" has said.
I have the Cloves timing chain on stock gears. So I'm not sure if the statement about retardation by stock timing chain is accurate or even applies? It makes good power I just wish it was a little lower on the RPM chart. Guess I'll look into the TC first and go from there.
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Re: Should I advance my cam more? TSP 228R
If you can afford to buy a new cam just to change the ICL have at it, but the adjustable doble row Rollmaster is under $100 at SDPC and it has 9 keywas to choose from. Your P/V clearane only gets closer on either the intake or exhaust valves when you advance the cam and the converse is true when you retard it. I just can't remember which direction makes which on get closer right now, but it only makes one closer and the other further away. It does make them both closer to the piston crown at the same time.
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Re: Should I advance my cam more? TSP 228R
James are you sure your TSP 228R is on a 109 LSA? Do you mean you have a 112 LSA +3 meaning your on a 109 lobe center?
I know that my TSP 228R is on a 111 LSA with +2 and we added +2 more for a total of 4*.. So, I'll be centered @ 107* ATDC when installed 4* advanced.. I discussed this with Trevor before buying.. I'm wanting to build alot more low end torque.. I'm not into peak HP, 400 will be fine.. I also don't want to spin the LQ9 to 6700+ I wanting more like 63-6400rpm..
I know that my TSP 228R is on a 111 LSA with +2 and we added +2 more for a total of 4*.. So, I'll be centered @ 107* ATDC when installed 4* advanced.. I discussed this with Trevor before buying.. I'm wanting to build alot more low end torque.. I'm not into peak HP, 400 will be fine.. I also don't want to spin the LQ9 to 6700+ I wanting more like 63-6400rpm..
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Re: Should I advance my cam more? TSP 228R
I have a hard time believing that cam w/ PPS2 heads peaks at 6600 rpms. I'll be dynoing mine soon and I'm anxious to see the results. Mines 112+4, so its in at 108 w/ the stock chain. Wonder if it has anything to do with your X pipe?
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Re: Should I advance my cam more? TSP 228R
James are you sure your TSP 228R is on a 109 LSA? Do you mean you have a 112 LSA +3 meaning your on a 109 lobe center?
I know that my TSP 228R is on a 111 LSA with +2 and we added +2 more for a total of 4*.. So, I'll be centered @ 107* ATDC when installed 4* advanced.. I discussed this with Trevor before buying.. I'm wanting to build alot more low end torque.. I'm not into peak HP, 400 will be fine.. I also don't want to spin the LQ9 to 6700+ I wanting more like 63-6400rpm..
I know that my TSP 228R is on a 111 LSA with +2 and we added +2 more for a total of 4*.. So, I'll be centered @ 107* ATDC when installed 4* advanced.. I discussed this with Trevor before buying.. I'm wanting to build alot more low end torque.. I'm not into peak HP, 400 will be fine.. I also don't want to spin the LQ9 to 6700+ I wanting more like 63-6400rpm..
Thanks!
Trevor
That is quoted from an e-mail I got from trevor.
I am changing my TC soon to a PT4000. This should help out alot. Plus I'll be spraying soon and this will help me not have too high of a shift extension.
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Re: Should I advance my cam more? TSP 228R
QUOTE: "FYI, The intake centerline (ICL) is the LSA minus the amount of advance ground into the cam. So, your 228R has a 109 ICL and 112 LSA, so there's three degrees of advance".
Ditto on that...
Ditto on that...